Harish was asked to identify a piece of soft iron put in a basket of 10 magnets of the same shape and size. Which is the easiest way of identifying the iron piece at the earliest?
Harish was asked to identify a piece of soft iron put in a basket of 10 magnets of the same shape and size. Which is the easiest way of identifying the iron piece at the earliest?
The correct option is C By conducting repulsion test using any two magnets at a time
Repulsion is the surest test for magnetism. It is the surest test because any substance made of iron, nickel, cobalt will also have an attraction but won't have repulsion. Harish can conduct the repulsion test by taking two magnets. In this way, he has to conduct the test for a maximum of five times.
Dropping a magnet in water will have no effect. By bringing a strong magnet toward the basket, the magnet may get attracted towards the strong magnet depending on the orientation of the pole. By suspending all the substances, the magnet may be identified as it will align in the N-S direction. But it will be a time-taking as well as an inaccurate process.
By conducting repulsion test using any two magnets at a time
Repulsion is the surest test for magnetism. It is the surest test because any substance made of iron, nickel, cobalt will also have an attraction but won't have repulsion. Harish can conduct the repulsion test by taking two magnets. In this way, he has to conduct the test for a maximum of five times.
Dropping a magnet in water will have no effect. By bringing a strong magnet toward the basket, the magnet may get attracted towards the strong magnet depending on the orientation of the pole. By suspending all the substances, the magnet may be identified as it will align in the N-S direction. But it will be a time-taking as well as an inaccurate process.
